Week 3 Quiz

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Week 3 Quiz

Image 1

Debugging is made easy if error messages are understood by the programmer. What does the column highlighted in Image 1 represents?

Hint: This is not covered explicitly in the lecture. However, you can create errors to try and understand what the above might mean

It is the column index of the program where the error is most likely at

It is the row index of the program where the error is most likely at

It is the pixel index of the program where the error is most likely at

It doesn't represent anything

Clear selection

In last week's lecture, the -Wall option was discussed in revealing warnings during compilation of our code. This week, a new option was discussed, -lm. What is this option used for?

Allows C programs with the math.h library to be compiled successfully

Triggers a new mode in Vim that allows the pointer (mouse) to be used

This is not an option. It is a UNIX command

This option is a default option and must be provided with the gcc command

Clear selection

In previous weeks, C libraries were discussed. This week, a particular one was discussed in detail - math.h. What is the purpose of using math.h?

Enable operators, such as +, -, /, *, to be used in our code

Perform specialised math operations, such as computing power of a number by using pow().

Allows input and output to be processed using scanf() and printf()

I'm a gardener and I'm back again

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Image 2

In page 7 of week 3 lecture notes, temperature (T) is shown to be computed in a formula as seen in Image 2 above. What would be the appropriate data type for T?

Hint: Note that while whole numbers have no decimal places, division might lead to some decimal places.

int

char

float

string

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This week a new topic was discussed - writing our own functions. What are the names that can be given to our own functions?

Names that comprise of numbers only

Names that comprise of alphabets only

The permitted names are reflected in the Ascii table.

Any name would work, as long as it doesn't start with a number or special characters and the name is not used before

Clear selection

Return types of our functions determine the type of value that can be returned with the "return" keyword. Which of the following data types is an invalid return type?

int

char

void

All of the above will work.

Clear selection

Sometimes function parameters are used to pass values into functions. What is the limit of function parameters that can be written into a function?

Infinite

Depends on the specifications of the C

The question is wrong. There is no such thing as function parameters.

Clear selection

To compile programs with our own functions (besides the main function), what additional options must be added to the gcc command?

-lm

-Wall

-o

None required

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In exercise #4 (pg 34), part of the question focuses on getting the right-most digit of a number (i.e. 6 is the right-most digit of 123456). How can this be done?

Hint: Since the subject here are numbers, focus on operators that perform reduction

Reduce the number by 10 to get the digit.

Divide the number by 10 to get the digit

Modulo the number by 10 to get the digit

Increase the number by 10 to get the digit

Clear selection

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